MQ-2 Flammable Gas and Smoke Sensor Module (MQ2 Gas Sensor)

The MQ-2 Flammable Gas and Smoke Sensor Module is a gas detection module designed to detect LPG, propane, methane, hydrogen, alcohol vapors, and smoke in the surrounding air. Based on the MQ-2 gas sensing element, it provides both analog and digital outputs for easy interfacing with Arduino, ESP32, Raspberry Pi, STM32, and other microcontrollers. The module is widely used in gas leak detection, safety systems, and environmental monitoring applications.

Key Features -

• Detects flammable gases and smoke

• Dual analog and digital outputs

• Adjustable sensitivity via onboard potentiometer

• Fast response and recovery time

• High sensitivity to LPG, methane, hydrogen and alcohol

• Onboard LM393 comparator

• Power and status indicator LEDs

• Low power consumption

• Easy microcontroller interfacing

• Suitable for gas leak detection systems

Specifications -

• Product type - Gas Sensor Module

• Sensor type - MQ-2 Gas Sensor

• Detection gases - LPG, Propane, Methane, Hydrogen, Alcohol and Smoke

• Operating voltage - 5V DC

• Output type - Analog and Digital

• Detection range - Approximately 300ppm to 10000ppm

• Preheat time - Approximately 20 Seconds (Longer Recommended for Stable Readings)

• Response time - Fast

• Comparator IC - LM393

• Board type - Gas Sensor Module

Applications -

• Gas leak detection

• Smoke detection systems

• Home safety systems

• Industrial safety monitoring

• Fire alarm systems

• Environmental monitoring

• Arduino and IoT projects

• Embedded electronics